This is the 845th most frequent Catalan word.
europeu
European.
Here, 'europeu' acts as an adjective describing 'llibre' (book), indicating its origin or style related to Europe.
Aquest és un llibre europeu molt interessant.
This is a very interesting European book.
In this case, 'europeu' is used as a noun representing a person from Europe.
L'europeu va arribar ahir a la ciutat.
The European arrived in the city yesterday.
'Europeu' functions as an adjective here, describing 'context,' indicating that the context is related to Europe.